The first church in Rhuddlan was built around 1080. In 1301, a new temple had to be built, as the older one had to be pulled down to make place for the castle, then erected. In the second half of the fifteenth century, the church was enlarged by a second nave, and around 1500 a tower on its west side. The expansion probably took place as a result of damages to the building during the Welsh rebellion of Owain Glyndŵr at the beginning of the fifteenth century. In the nineteenth century, the church underwent several Victorian renovations, during which the appearance of the nave and the chancel were unified. The nave and presbytery of the 14th century started to act as a side aisle, and the nave of the 15th century took over the functions of the main nave and the presbytery. In 1820, on the northern side of the church, Bodrhyddan’s Mausoleum was added.
The church was built as a single-nave, rectangular building. Judging by the preserved inside piscina, the chancel was added a little later, but still in the fourteenth century, originally it was also slightly narrower. In the second half of the fifteenth century, a new nave was added on the north side, in the perpendicular gothic style, and a tower adjacent to it from the west. Both naves had the same length but differed in the width of the eastern part. In the southern wall of the nave, the original, narrow pointed windows have been preserved and the moved entrance portal. From the south there is also a 15th-century porch, rebuilt in the 19th century.
Website cpat.demon.co.uk, Church of St Mary, Rhuddlan.